Quick start

GENTLEMAN proposes a lot of options and configurations to propagate an orbit then build TLEs. Anyway, in order to allow to start first simulations very quickly, the GENTLEMAN GUI, many parameters are set to default values.

Launch the main GUI

To launch the GUI you only have to double click on Windows systems or type :

 java -jar gentleman-xx.x-jar-with-dependencies.jar

Then, the GUI is displayed as is:

Initialize the orbit

The only data needing to be correctly initialize is the orbit. Indeed, by default, it is set as a “simple” LEO orbit but with zero apogee altitude.

So let us fill these entries with a 299/300km orbit as the eccentricity of the orbit must be greater than 0 (see Orbit data).

Build your first TLE

Then, we have just to push on the button and you will obtain your first TLE!

Plots

Moreover, if you want to have a look on some graphical results, it is possible to select the Plots panel. By default, no results are displayed …

So, you will have to push on the button in order to select a result file.

The only one up to now available is the one just created by the previous run: GTM_DIF_DEFAULT.txt

You will display this kind of plots: here error on the semi-major axis between the simulated trajectory and the one obtained using the created TLE all along the simulation (during 24h00 with a point each hour).